package com.infomanage.servlet;

import java.io.IOException;
import java.io.PrintWriter;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import com.infomanage.dao.UserDAO;
import com.infomanage.exception.DaoException;
import com.infomanage.po.User;

public class LoginServlet extends HttpServlet {

	/**
	 * Constructor of the object.
	 */
	public LoginServlet() {
		super();
	}

	/**
	 * Destruction of the servlet. <br>
	 */
	public void destroy() {
		super.destroy(); // Just puts "destroy" string in log
		// Put your code here
	}

	/**
	 * The doGet method of the servlet. <br>
	 *
	 * This method is called when a form has its tag value method equals to get.
	 * 
	 * @param request the request send by the client to the server
	 * @param response the response send by the server to the client
	 * @throws ServletException if an error occurred
	 * @throws IOException if an error occurred
	 */
	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
	}

	/**
	 * The doPost method of the servlet. <br>
	 *
	 * This method is called when a form has its tag value method equals to post.
	 * 
	 * @param request the request send by the client to the server
	 * @param response the response send by the server to the client
	 * @throws ServletException if an error occurred
	 * @throws IOException if an error occurred
	 */
	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {

		String username = request.getParameter("username");
		String password = request.getParameter("password");
		if(username == null || username.equals("") || password == null || password.equals("")){
			response.sendRedirect("login.html");
		}
		
		UserDAO dao = new UserDAO();
		try {
			User user = dao.findUserByName(username);
			if(user == null){
				response.sendRedirect("login.html");
			}else{
				if(password.equals(user.getPassword())){
					request.getSession().setAttribute(com.infomanage.util.Consts.LOGINED_USER, user);
					response.sendRedirect("index.html");
				}else{
					response.sendRedirect("login.html");
				}
			}
		} catch (DaoException e) {
			e.printStackTrace();
		}
		response.setContentType("text/html");
		PrintWriter out = response.getWriter();
		out.flush();
		out.close();
	}

	/**
	 * Initialization of the servlet. <br>
	 *
	 * @throws ServletException if an error occurs
	 */
	public void init() throws ServletException {
		System.out.print("");
	}

}
